pub fn new_birthday_probability(n: u32) -> f64 {
    // TODO: 这里写逻辑
    if n > 365 {
        return 1.0
    }
    let mut res = 1.0;
    for i in 0..n {
        res *= (365 - i) as f64 / 365.0
    }
    return 1.0 - res
}
